Refrigerator car



' 30, 1940- F. A. lsAAcsoN REFRIGERATOR CAR original Filed sept. 24, 1937 4 Sheets-Sheet l APTAil 30, 194- F. A. lsAAcsoN v 2,199,073

REFRIGERATOR CAR Original Filed Sept. 24, 1937 4 Sheets-Sheet 2 @@OQOQ 520 QQCL' o o oooooooooooo ooo ooooooo April 30, 1940 F. A. lsAAcsoN REFRIGERATOR CAR Original Filed Sept. 24, 1

4 Sheets-Sheet 3 @wk/id21 fZ IFM@ April 30, 1940. l F. A. lsAAcsoN 2,199,073

REFRIGERATOR CAR origirial Find supi. 24, 1936 4 sheets-sheet 4 Patented pr. 30, 1940 UNITED STATES REFRIGEBATOB CAB Fred A. Isaacson, Topeka, Kans., assignor to Transportation Specialties Company, Chicago, Ill., a corporation of Illinois Application September 24, 1937, Serial No. 165,448 Renewed September '1, 1939 14 Claims.

'I'he present invention relates to refrigerator cars, and is particularly concerned with the provision of an improved construction for the ice bunkers of a refrigerator car, for the purpose of facilitating half stage, icing.

In transporting perishable products in railway refrigerator cars, there are certain products for which a full ice capacity is not desirable or necessary to keep the cargo in the best condition. Full ice capacity is also undesirable on a short haul, and even on a long haul when the perishable load has been properly pre-cooled, because it is then expensive and unnecessary to carry the full amount of ice in the bunkers.

One of the best ways to reduce the ice capacity of a refrigerator car is to raise the grates of the ice bunker to a position approximating "onehalf the capacity of the ice bunker, thereby effecting a saving in the icing bills, since only onehalf the amount of ice can be applied to the bunkers.

If the vgrates are not raised, invariably at the re-icing stations the bunkers are filled tothe top by unskilled employees, and the shipper is charged for a full tank of ice when only a half tank was required.

There are also times when a load of perishable products requires as much ice as can be loaded into the ice bunkers to carry the load safely to its destination without re-icing, and for this purpose it is important that the ice bunker be capable of receiving a full load of ice, that the air passages be unobstructed, and that there be no obstructions in the ice bunker to interfere with the proper loading of the ice.

Ordinarily, when a refrigerator car is being iced, large cakes of ice are broken into chunks and dropped through the hatches into the ice bunkers. These chunks do not iill the ice bunker solid, as there is no way of controlling the location of the chunks or packing them closely together.

However, whenever a maximum amount of ice is desired, the procedure is to drop the full cakes of ice into the bunkers and stack them in place by hand. By using full ice cakes and loading them properly, the amount of ice carried in the ice bunkers can be' increased from the approximate usual ten thousand pound load to approximately twelve thousand or thirteen thousand pounds. This increase in ice capacity and the loading of cake ice can be accomplished only `when there are no obstructions in the ice bunkers, as the ice bunkers are of such dimensions as to receive standard size ice cakes.

The half icing arrangements of the prior art are accompanied by obstructions secured to the bulkhead side and to the end wall of the ice bunker in such manner that they are a hindrance to the proper loading of cake ice. 5

One of the objects of the invention is the provision of an improved ice bunker construction adapted for half icing in which all of the ttings are enclosed or flush with the inner surface of the ice bunker so that there are no obstructions l0 in the ice bunker to hinder the proper loading of cake ice.

Another object of the invention is the provision of an improved support for half stage ice grates, which will not interfere with full cake 15 ice loading.

Another object is the provision of an improved half stage icing arrangement including auxiliary grates which arefadapted to be folded against the lsidewall without interfering with the circulation of the air through the grates in a lateral direction or with the circulation of air upward outside of the ice and vertical grate in the air passages. f

Another object is the provision of an improved movable grate arrangement for half icing in which provision is made for the automatic securement of the grates in folded position and for the locking of the grates in such manner that they are flxedly secured against rattling and the weight of the grates is removed from the hinges thereof.

Another object is the provision of an improved form of grate which is best adapted to support ice in the bunker in such manner as to facilitate a maximum amount of circulation and the provision of ttings for ice bunkers which are adapted to be secured to the existing structures of bulkheads, with the fittings substantially iiush with the inner wall of the bulkhead.

Another object of the invention is the provision of an improved form of securing device for half icing grates which may be moved into a position where it is outside of the ice bunker wall and inside the bulkhead wall when the grate is lifted and moved to its folded position.

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which similar characters of reference indicate similar parts throughout the several views.

Referring to Fig. 1, this is a fragmentary vertical sectional view of a refrigerator car which is provided with an ice bunker constructed according to the present invention, thel section being taken on a line extending longitudinally of the car and verticallythereof, through a hatchway;

Fig. 2 is a vertical sectional view through the ice bunker of Fig. 1, showing the end wall con-- struction of the car and. half stage icing grates folded up against the wall of the car;

Fig. 3 is a vertical elevational view of one bulkhead section, taken on the plane of the line 3-3 of Fig. 1, looking in the direction of the arrows, showing the elevational view-of the grate-supporting fittings carried by the bulkhead wall;

Fig. 4 is a fragmentary vertical sectional view of that part of the ice bunker adjacent the end wall of the car at the left in Fig. 1 on a larger scale, showing the construction of the fittings for hingedly supporting the auxiliary ice grates and for holdingthem in folded position, taken on the plane of the line 4-4 of Fig. 2, looking in the direction of the arrows;

Fig. 5 is a fragmentary elevational view of the structure of Fig. 4, seen from the right of Fig. 4:

Fig. 6 is a fragmentary elevational view of a part of the bulkhead section of the construction shown in Fig. 3, with the details of construction of the ttings shown on a larger scale, to illustrate the details thereof, taken on the plane of the line 6--6 of Fig. 1, looking in the direction of the arrows;

Fig. 7 is a fragmentary vertical sectional view of the structure of Fig. 6, taken on the plane of the line I-'I of Fig. 6, looking inthe direction of the arrows;

Fig. 8 is a fragmentary elevational view of the lower part of a folded ice grate of Fig. 2 and a locking device for positively securing the ice grate in folded position;

Fig. 9 is a fragmentary vertical sectional view taken on the plane of the line 9-9 of Fig. 8.

Referring to Fig. 1, I indicates in its entirety the refrigerator car, which is formed with the usual side walls I I, I I, ceiling I2, floor I3, and end wall I4. 'I'he ice bunker at each end of the refrigerator car is formed by means of a partition spaced from the end I4 of the car, comprising the bulkhead I5.

One or more hatchways I6 lead into the ice bunker of the car through the roof and ceiling I2, and are provided with the usual covers.

The bulkhead I may comprise a plurality of channelled vertical members I6, formed at the edges of metal plates I1, which provide the body of the bulkhead, the channelled members of various sections being secured together to form the complete bulkhead. Each section has a ventilation opening I8 at the bottom between the legs or channels I5 andthe ventilation openings I9 at the top, formed in the body II of the bulkheadsection, and a multiplicity of apertures 20 are formed in the plate I'I between its bottom and top so as to permit access of the air to the ice at any point or elevation in the load of ice. The other three walls or sides of the ice bunker chamber 2I are covered with wire screen 22, suitably supported upon wooden strips 23, which are bolted to the car wall, such as the side walls I I and end wall I4.

'I'he car walls, ceiling and floor are, of course, provided with suitable insulation, and the floor in the ice bunker chamber 2l is covered with waterproof covering24 of metal or other suitable material adapted to receive the drippings from the ice and cause them to drain through a water trap.

The load in the car is supported upon suitable :door racks in spaced relation to the oor I3 in flower half of the end of the car.

such manner that the air may circulate upward through the ice bunker at ventilation openings I8, about the load, downward through the carload, and through the openings in the oor racks, and under the floor racks, thence toward the ice bunker, through the ventilation spaces I8, under the bulkhead.

The bulkhead is usually lprovided with the wooden sheathing 25 inside the car, for supporting the load and receiving the thrust of the load when the cars are moved or stopped, and the sheathing with the plate IT forms a ventilation space between the channelled members I6 of the bulkhead sections. There is also a ventilation space between the wire screen 22 and the' layer of sheathing or other material 26 on the .other three sides of the ice bunker chamber 2l.

In the example of car construction which has been chosen to illustrate the invention, the bulkhead I5 is supported from the top of the car by means of securement to the walls Il of the car, and the thrust on the bulkhead is transmitted by diagonally extending channelled members4 21 to supporting members 28 in the lower end corner of the car underneath which the sill is located. I'he ice is supported upon a plurality of grates or ice pans 29, ,which are carried at each end by the channelled or angle iron members '30, 3I at a point spaced from the door covering 24.

In order to provide for half stage ice grates, I prefer to eliminate the strips 23 and screen 22 which surround the other three sides of the ice bunker chamber 2I at a point 32 half-way up on the end wall of the car, down tothe ice grates 29. This is done by cutting oiI the strips 23 at the point 32 and omitting the screening 22 on that half of the end wall of the car or side of the ice bunker, the screen being replaced by auxiliary -ice grates or pans 33, 34, etc., as will be described hereinafter.

The ice grates or pans 34 may' comprise stamped sheet metal members, having a body flange 35, which is substantially plane and at except for the provision of a plurality of downwardly extending ribs 36, 31, 38, 39, comprising stamped formations in the body ange 35.

'I'he body* flange 35 is provided with a multiplicity of perforations 40, preferably uniformly spaced and located throughout the complete area of the body flange 35 of the ice pan, including even the upwardly extending ribs 36-39.

Ice pans 33, 34, etc. are also provided with border flanges 38', 39', 40', 4I on each side or edge of the body plate 35, the border anges extending at substantially right angles to the body plate 35 of the ice pan and strengthening the ice pan.

In addition to this, the lateral; border flanges 39', 4I may have inwardly turned extensions 42, 43, providing the ice pan with additional strength, since these flanges are located on the lower side of the ice pan when it is in position to be loaded with ice.

'Ihe ice pans 33, 34, etc. are preferably of the same width as the center dimension between channelled members I5 of each bulkhead section, so that as many ice pans may be used as bulkhead sections are used, and the ice pans may be applied to any car which the bulkhead sections fit.

In order to install the present half icing construction in the refrigerator cars so far described, the wooden strips 23 are cut olf at the point 32, and the wire screening 22 is omitted from the The wooden strips are spaced equally with the channelled members I3 of the bulkhead, and therefore one of the ice pans 33 or 34 may be mounted between each of the wooden strips 23. For this purpose the car is provided with hinge fittings 45-41, etc.

The corner fitting 45 is similar in construction to one-half of the fitting 45, as will beapparent from a description of the latter tting. The tting 45 (Fig. 5) is provided with the attaching flanges 41', 48 located in the same plane and adapted to be secured to the wall of the car. The body 49 of the tting is located behind the wooden strip 23, and the fitting is provided with the guide flanges 49, 58 at right angles to the attaching flanges 41', 48, and spaced sufliciently to receive the wooden strip 23.

A pair of stop fianges 52 abut against the lower end of the wooden strip 23, and the fitting has the downwardly and forwardly extending bearing lugs 5354, which are provided with the slotted bearing openings 55 for receiving the pintles 55.

Each of the pans 33 is provided with a pair of bearing fittings 51, which may be secured to the lower side of the ice pan, at the uppermost corners thereof, in Fig. 2.

Referring to Fig. 5, the fittings are there shown in detail, and each tting is provided with the attaching flanges 50, 5| at right angles to each other, and adapted to extend vertically in the car. and with an abutment flange 52, which hits the end of the wooden strip 23.

These bearing fittings are provided with attaching flanges 58 and with a pair of upwardly extending bearing lugs 59, each of which is provided with an aperture 50 for receiving the pintle 55.

The pintles 55 extend through the bearing lugs 59 and bearing lug 53, and are provided at one end with the head, and at the other with an aperture for receiving thecotter 5|. The bearing fittings 51 may be secured to the ice pans by spot welding or welding along the edges of the fitting, or any other convenient fastening means.

It will be seen that the fitting is also provided with an attaching flange 52 -at right angles to the flange 58 for engagement with the border flange 39 or 4|. The aperture 53 in the fitting is merely for decreasing the weight of the fitting, and the edge flange 54 of the ice grate between the fittings is bent back upon itself to strengthen the edge of the ice pan.

The ice pan is also stiifened by the rib 31, which extends across the pan between the iittings 51. At the opposite edge of the ice pan, the pan is preferably provided with a channelled member 55 of substantially U shape, comprising a iiat body 55, and a pair of side flanges 51, 58.

I'his channelled member is likewise welded to the body of the ice pan and to the border ange 40 along both of the flanges 51, 58, and it serves to stiifen this edge of the ice pan and to provide means for engaging a support, which will be described further hereinafter.

The reinforcing fianges 42, A43 on the ice pan are spaced from the main body 33 of the ice pan by an amount equal to the spacing between the sheathing 25 and the screening 22. The slotted hinge openings 55 are spaced from the attaching iianges 41', 48 of the fitting 45 by such an amount that the reinforcing flanges 42 have a slight clearance with respect to the sheathing 25 when the ice pans are in the position of Fig. 4. 'I'hus there is a space 59 between the sheathing 25 and the body 33 of the ice pan which is equal to the space between the screening 22 andthe sheathing 25.

When the ice pans are folded there is substantially no obstruction of the ventilation spaces on this side of the ice bunker. The air may pass up between the sheathing and 'the ice pans 33, 34, and on upward between the sheathing and thescreening 22, as it does in a car which is provided solely with screening.

The half icing arrangement is so constructed that it does not interfere with the circulation. The attaching flanges 41, 48 and 50 of the fitting 48 are provided with apertures for receiving a plurality of bolts passing through the fitting and sheathing and the bolt 1I, which passes through the wooden strip 23. The cut-out 12 is made merely for the purpose of decreasing the weight of the fitting 45.

Referring to Fig. 2, it will be observed that the corner fitting 45 is similar in construction to the right half of the fitting 45, so that it need not be described in detail.

It should also be observed that the top of the ice pan 33 lies flush with the screening 22 when the ice pan is in the position of Fig. 4 or Fig. 1. There are no obstructions on the left side, of the car in Fig. l to interfere with the packing of the rectangular pieces of ice to fill every part of the ice bunker.

The grate-supporting member 13 in the lower left corner (Fig. 4) supports the channelled member 38, which carries the main grate, and it is provided with an angle iron 14, which may be secured thereto by bolts 15.

A sheet metal detent takes the form of an angle iron, with a hump 11 in one flange, and one flange of the angle iron 15 is welded to the angle 14 at 18, and the other flange is welded to the angle 14 at 19, in such manner that the hump 11 is uppermost, and a fiat portion 80 is directly below the ice pan 33.

The slot 55 in the ice pan pivotal arrangement permits the ice pan to move upwardly and be lifted off its pintles when the lower edge or border flange`48 engages the hump 11, and the ice pan comes to rest behind the hump 11 on the at flange 80, where it is retained by the hump 11.

The hump 11 may serve to retain the .ice pans in place satisfactorily in the event the auxiliary fastening devices 82 (Fig. 2) are not moved into proper position by careless operators. However, I prefer to provide the ice grates with a positive fastening device 82 for each ice pan.

Referring to Fig. 4, it will be noted that the angles 14 extend completely across the ice bunker, whereas thev detent angle 15 is relatively short.

The detent angle 15 shown inl Fig. 4 at the left is twice as wide as the one 83 which is shown at the left side of Fig. 2 adjacent the wall, since pivotaily mount the securing members 82. Each securing member 82 comprises a short strap of sheet metal, the leading corner 85 of which is bent outwardly out of the strap 82, so that its surface 85 may serve as a camrning surface to cam the grate 33 back into its proper position. The lower end 81 of the securing member 82 has a rounded corner at the right, but a stop surface 88 is provided by the left hand corner, which prevents the securing member 82 from rotating counterclockwise beyond the position of Fig. 8.

It may be rotated from that position to the dotted line position indicated by numeral 98 (Fig. 8) ,'to release the grate. 1

Suitable spacers 9|' are used on the pivot bolts 8l so as Vto bring the securing members 92 into the proper plane. The thickness of these securing members is negligible when compared with the size of an ice cake, and consequently they do not form any substantial obstruction in the ice chamber.

Referring to Fig. 1, the dotted line position of the grate, which has been numbered 03. in that gure, indicates the position of the grate when it is used for half stage icing. It is supported in this position at the left end by means of the hinges previously described.

At the right end there is provided a supporting device in the form of a pivotal member or latch 9|, which is adapted to remain in the gratesupporting position or in the folded position by virtue of its weight. The details of this latch are shown in Figs. 6 and 7. 'Ihe structure is particularly adapted to be secured to the perforated body flange of the bulkheads.

The latch member 9| is preferably arranged midway between the channelled members I6 of the bulkhead sections, and it preferably comprises a pair of supports which are spaced from each other, and which engage the ice pan at points equally distant from the edges thereof, to provide a balanced support. The latch member 9| is pivotally mounted upon a cast metal fitting 92, which is shown in elevation in Fig. 6.

The cast metal tting 92 may be substantially rectangular in elevation, except for the outwardly projecting lugs 93-99, which are provided with cup-shaped formations 91 'and through apertures 98.

The cup-shaped formations 9`| in the lugs 93--96 are so located that they substantially coincide with certain of the round apertures 20 in the body flange I1 of the bulkhead. The bulkhead is then cut out or provided with a rectangular aperture 99 adjacent each of the supporting arms |00 of the latching member 9|, and this permits the latching member 9| to pivot over into the position of Fig. 7, through the bulkhead.

The fitting 92 is preferably provided with a rectangular aperture |0| so as to lighten the tting, and it has a flat back surface |02 so as to engage atly the body flange of the bulkhead section.

'Ihe bolt-supporting lugs 93-99 are preferably joined by reinforcing ribs |03|06, and the end ribs |05 are provided with bearing lugs |01, |00, having aligned cylindrical apertures |09.

'I'he cup-shaped members 91 may be secured to the bulkhead by a plurality of screw bolts ||0, the arrangement being the same for each bolt, as follows:

A sheet metal cup is provided of sufficient size to receive the head 2 of the bolt ||0. and also suitable in size to be received in the cup 91. This cup-shaped sheet metal member is also provided with a transverse border flange Ill,

f and the cup is of such size that it passes through the aperture 20. 'Ihe cup also has a cylindrical aperture Ill for passing the bolt ||0. and thus the head of the bolt may be located in the cup with its shank passing through the bore III.

'I'he transverse flange III may engage one side of the bulkhead flange and the bolt ||0 may have its nut driven home to draw the fitting 92 tightly against the bulkhead flange Hence there is no change needed in the bulkhead section except the provision of the relatively small rectangular apertures 99.

The latching or supporting members 9| are pivotally mounted on rods or bolts Ill, which are locatedvin the bores |09 and securedby means of the bolt head and a suitable nut. Each latching or supporting member 9| may be constructed as follows:

The latching member is made of cast metal and is provided with an elongated sleeve IIS, having extending through it a cylindrical bore ||'l by means of which the latching member 9| is pivotally mounted on the bolt H5. The sleeve ||6 has .a plurality of integral laterally projecting arms |00, |00, and the arms are preferably 1ocated at the ends of the sleeve ||0 adjacent the edges of the rectangular opening |0|.

Each supporting arm |00 may be substantially channelled in shape, having an upper fiat surface ||9 and a pair of downwardly extending reinforcing anges H9, |20.

Each supporting arm |00 is also provided with a stop ilange |2| at right angles to the supporting surface |00 for engaging an upwardly extending stop flange |22. which is carried by the fitting 92. The stop flange |22 and stop ange |2| are so located with respect to the axis of pivot of the supporting member 9| that when these stop flanges are in engagement with each other the :dat surfaces ||8 which support the grate are substantially horizontal, and they engage the body ange 66 of the channelled mem-1 ber 85 to support the grate.

'I'he latching members 9| have the axis of pivot, that is, the axis of the bolt ||5, located between the stop flange |22 and the arm |00, and therefore the weight of the arm |00 tends to maintain the latching member 9| in the position of Fig. 7. When the latching member is moved up ward by hand to the dotted line position of Fig.7, it will likewise'be retained in that position by the weight of the supprting arm |00, which engages the top of the flange |22. When these latching members are in that position, the grate is in the full line position of Fig. 1, and it will be observed that the latching members are wholly out of the ice chamber 2|, so that they do not form any obstruction in the ice chamber. The latching members 9| do not form any obstruction in the main compartment of the refrigerator car because they are small enough so that they are concealed between the channels I6 of the bulkhead and between the main-ilange of the bulkhead and the sheathing 25.

It will thus be observed that I have invented an improved construction for a half stage icing grate which may be installed in existing refrigerator cars with a minimum amount of change of structure of the car.

One of the most important features of my half stage icing construction is that there are no obstructions to the packing of rectangular cakes of ice into every part of the space of the ice bunker when the half stage icing grates are folded against the wall; that is, it is a flush type of half stage icing grate, without any obstruction in the ice chamber, and the construction is also so arranged that the ice bunker has the desirable air ventilation spaces on all sides of the ice bunker, including the side where the auxiliary half stage icing grates are supported.

The present grates have their weight removed from the pintles when they are not being used so that the danger of breakage of the pintles is minimized, and the grates are positively secured against rattling when folded and securely supported by the latching members 9| when in the half stage icing position.

By means of my half stage icing arrangement. any refrigerator car may be made adaptable to the transportation of various kinds of loads which do'not require full stage icing and there is n'o possibility of the half stage ice compartment being provided with more ice than is needed, as frequently happens when half icing is used in full sized bunkers.

While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what lI claim as new and desire tosecure by Letters Patent of the United States, is:

1. In a refrigerator car, the combination of a car having insulated side walls, end walls, floor and ceiling, with an ice bunker formed by a bulkhead located at a point spaced from one end of the car and provided with an ice grate, said bulkhead having ventilation -spaces on all sides of the ice chamber and being provided with an auxiliary half stage icing grate, said half stage icing grate being pivotally mounted at one side of said ice chamber in such a manner that'the grate separates the ice from a ventilation conduit, and supporting means for the opposite end of said icing grate adapted to beihoused within the wall spaces of the bulkhead, so that there are no obstructions in the ice chamber when the grate is in this position.

2. In a refrigerator car, the combination o'f a car having insulated side walls, end walls, floor and ceiling, with an ice bunker formed by a bulkhead'located at a point spaced from one end of the car and provided with anice grate, said bulkhead having ventilation spaces on all sides of the ice chamber and being provided with an auxiliary half stage icing grate, said half stage icing grate being pivotally mounted at one side of the ice chamber in such manner that the grate separates the ice from a ventilation conduit, and so that there are no obstructions in the ice chamber when the grate is in this position, said grate being pivotally movable to a substantially horizontal position, and means carried by the bulkhead and adapted to be housed within the walls of said bulkhead for supporting the adjacent end of the grate in said latter position, whereby no obstructions are left in the ice chamber to interfere with the packing of the ice when the grate is in the position beforementioned.

3. In a refrigerator car, the combination of a car having insulated side walls, end walls, floor and ceiling, with an ice bunker formed by a bulkhead located at a point spaced from one end of the car and provided with an ice grate, said bulkhead having ventilation spaces on all sides of the ice chamber and being provided with an auxiliary half stage icing grate, said half lstage icing grate being pivotally mounted at one side of the ice chamber in such manner that the grate separates the ice from a ventilation conduit, and so that there are no obstructions inthe ice chamber when the grate is in this position, said grate being pivotally movable to a substantially hori zontal position, and means carried by the bulkhead for supporting the adjacent end of the grate in said latter position, said means comprising a supporting member pivotally mounted on the bulkhead and adapted to be held by its weight in the grate-supporting position.

4. In a refrigerator car, the combination of a car having insulated side walls, end walls, oor and ceiling, with anice bunker formed by a bulkhead located at a point spaced from one end of the car and provided with an ice grate, said bulkhead having ventilation spaces on all sides of the ice chamber and being provided with an auxiliary f half stage icing grate, said half stage icing grate being pivotally mounted at one side of the ice chamber in such manner that the grate separates the ice from a ventilation conduit, and so that there are no obstructions in the ice chamber when the grate is in this. position, said f grate being pivotally movable to a substantially horizontal position, and means carried by the bulkhead for supporting the adjacent end of the grate in said latter position, said means comprising a supporting member pivotally mounted onthe bulkhead and adapted to be held by its weight in the gratesupporting position, said latter member being likewise held in position by its weight when moved to the non-grate supporting position'.

5. In a refrigerator car, the combination of a car having insulated side walls, end walls, floor and ceiling, with an ice bunker formed bya bulkhead located at a point spaced from one end of the car and provided with anice grate, said bulkhead having ventilation spaces on all sides of the ice chamber and being provided with an auxiliary half stageicing grate, said half stage icing grate being pivotally mounted at one side of said ice chamber in such manner that the grate separates the ice from a ventilation conduit, and so that there are no obstructions in the ice chamber when the grate 'is in this position, said auxiliary grate being pivotally mounted with a lost motion connection to the end wall of the car, and means for lighting the weight of the grate off its pintle and holding it in vertical position.

6. In a refrigerator car, the combination of a car having insulated side walls, end walls, floor and ceiling, with anice bunker formed by a bulkhead located at a point spaced from one end of the car and provided with an ice grate, said bulkhead having ventilation spaces on all sides of the ice chamber and being provided with an auxiliary half stage icing grate, saidvhalf stage icing grate being pivotally mounted at one side of said ice chamber insuch manner that the grate separates the ice from a ventilation conduit, and supporting means for the opposite end of said icing grate adapted to be housed within the wall spaces of the bulkhead, so that there are no obstructions in the ice chamber when the grate is in this position, and a member pivoted on an axis at right angles to the plane of the vertical grate for holding the grate in vertical position.

'7. In a refrigerator car, the combination of a bulkhead with a grate-supporting fixture, said grate-supporting fixture being provided with a at bulkhead-engaging surface and with a cupshaped formation having an aperture in the center thereof, said bulkhead having an aperture and a cup-shaped member in said bulkhead aperbulkhead with a grate-supporting xture, said grate-supporting fixture being provided with a flat bulkhead-engaging surface and with a cupshaped formation having an aperture in the center thereof, said bulkhead having an aperture and a cup-shaped member in said bulkhead aperture and having a radially extendingshoulder for engaging one side Voff-the bulkhead, a bolt passing through said latter cup-shaped member and through the first cup-shaped member to secure said fixture to the bulkhead, with the bulkhead between said cup-shaped members, said bulkhead being provided with an aperture at said xture, and a pivotally mounted grate-supporting arm mounted on said xture for movement through said aperture into the ice chamber.

9. In a refrigerator car, the combination of a bulkhead with a grate-supporting fixture, said grate-supporting fixture being-provided with a at bulkhead-'engaging surface and with a cupshaped formation having an aperture inthe center thereof, said bulkhead having an aperture and a cup-shaped member in said bulkhead aperture and having a radiall gxtending shoulder for engaging .one side ofthe bulkhead, a bolt passing through said latter cup-shaped member and through the rst cup-shaped member to secure said ilxture to the bulkhead, with the bulkhead between said cup-shaped members, said bulkhead being provided with an aperture at said fixture, and a pivotally mounted grate-supporting arm mounted on-said xture for movement through said aperture into the ice chamber, said grate-supporting arm and fixture being provided .with stop surfaces whereby the grate-supporting arm-'is held in horizontal position in the ice chamber by virtue of its weight.

10. In a half stage icing arrangement for refrigerator cars, the combination of a car with a half stage icing` grate mounted for pivotal movement at a pcnt substantially midway between the top and ottom of the ice chamber at one edge of the grate, with a bulkhead and a latching member carried by said bulkhead and adapted to support the opposite edge of said grate when the latching member is moved into position to project into the ice chamber. l

11. In a half stage icing arrangement for refrigerator cars, the combination of a car with a half stage icing grate mounted for pivotal movement at a point substantially midway between the top and bottom of the ice chamber at one edge of the grate, with a bulkhead and a latching member carried by said bulkhead and adapted to support the opposite edge of said grate when the latching member is moved into position tov projectvinto the ice chamber, said latching memoer being movable out of grate-supporting relation to the opposite side of the bulkhead to leave the space in the ice chamber unobstructed for lling full with cakes of ice.

l2. In a refrigerator car, the combination of a car having insulated side walls, end walls, floor and ceiling, with an ice bunker formed by a bulkhead located at a point spaced from one end of lary half -stage icing grate, said half stage icing grate being pivotally mounted at one side of said .ice chamber by pivot means housed within the borders of the walls of said ice chamber, and having supporting means at the opposite end of said ice grate also adapted to be housed within the walls and outside of the ice chamber proper so that there are no obstructions in the ice chamber when the half stage icing grate is pivoted downward and forms a part of the wall of the ice chamber.

13. In a refrigerator car, the combination of an ice bunkeriormed at one end of a car and bound by the side walls, 'end wall, iloor, and ceiling of said car, and by a bulkhead located at a point spaced from one end of the car, said bulkhead and car end supporting an-ice grate at the bottom'oi said ice bunker, and 'said ice bunker having a half stage icing grate comprising a grate pivotally mounted at one side of said ice chamber by pivoted means housed within the borders.

of the walls of said ice chamber in such manner that the grate may swing d own and form one oi the walls of the ice chamber, and supporting means for the opposite end o! said grate adapted to be housed within the walls of said ice chamberA proper so that there are no obstructions in the ice chamber when the half stage icing grate is pivoted downward to, form a part of the wall of the ice chamber.

14."In a refrigerator'car, the'combination of an ice bunker formed at one end of a car and bound bythe side walls, end wall, floor, and ceiling of said car, and by a bulkhead located at a point spaced from one end of the car, said bulkhead and car end supporting an ice grate at the bottom of said ice bunker, and said ice bunker having a haif stage icing grate comprising a grate pivotally mounted at one side of said ice chamber by pivoted means housed within the borders ofthe walls of said ice chamber in such manner that the grate may swing down and form one of the walls of the ice chamber, and supporting means for the opposite end of said grate adapted to be housed within the walls of said ice chamber proper so that there are no obstructions in the ice chamber when the half stage ic ing grate is pivoted downward to form a part of the wall of the ice chamber, said supporting means comprising a pivotally mounted member adapted Ato be engaged by the half stage icing grate when the grate is in horizontal position. and having stop means for supporting the member and grate, said pivotally mounted memberv being adapted to move pivotally away from said stop means into the wall of the ice chamber when the grate is lifted from said member.

FRED A. ISAACSON. 

